Hard to reason about. WhyFlat config keys lack structure. Tip Use strongly typed configuration objects.
Category: Asp.Net Core
ASP.NET Core Apps Scale Poorly Under Burst Traffic
Handles average load fine. WhyThread pool starvation during spikes. Tip Avoid blocking calls and tune concurrency.
.NET Core Configuration Grows Unmanageable
Too many settings. WhyFlat configuration structure. Tip Group settings into strongly typed sections.
ASP.NET Core Apps Start Slowly
First request is painful. WhyCold start and lazy service initialization. Tip Warm up critical paths on startup.
.NET Core Background Services Stop Silently
No crash, no logs. WhyUnhandled exceptions inside background tasks. Fix Wrap ExecuteAsync with global exception handling.
ASP.NET Core Apps Consume More Memory Over Time
GC works, memory still grows. WhyObject pooling misused. Fix Return pooled objects immediately after use.
.NET Core Logging Hurts Performance
Logs enabled, throughput drops. WhySynchronous sinks block execution. Fix Use async logging providers.
ASP.NET Core Apps Feel Slower Over Time
No memory leak detected. WhyThread pool starvation under burst load. Fix Avoid blocking calls in async pipelines.
.NET Core Memory Grows Without Leaks
GC runs but memory stays high. WhyLarge object heap fragmentation. FixReuse large buffers.
ASP.NET Core Requests Hang Randomly
No exceptions thrown. WhyThread starvation due to sync-over-async. Fix await Task.Run(() => AsyncMethod()).ConfigureAwait(false);
Configuration Reload Breaks Running Requests
Hot reload causes instability. WhyOptions snapshot changes mid-request. Fix Use IOptionsMonitor carefully.
ASP.NET Core Background Tasks Stop Randomly
Works until traffic spikes. WhyTasks tied to request lifetime. Fix Use IHostedService for background work.
Dependency Injection Causes Memory Bloat
Memory grows over time. WhyTransient services holding unmanaged resources. FixDispose resources explicitly or use scoped lifetime.
ASP.NET Core Thread Pool Starves Under Load
Requests queue endlessly. WhyLong-running sync tasks block threads. Fix await Task.Run(LongRunningWork);
Logging Slows Down ASP.NET Core APIs
Logs enabled, throughput drops. WhySynchronous logging blocks request threads. FixUse async logging providers.
ASP.NET Core Memory Usage Keeps Growing
GC runs, memory stays high. WhyObject pooling misused or ignored. Fix services.AddPooledDbContextFactory<AppDbContext>();
Configuration Differs Between Environments
Works locally, breaks in prod. WhyConfiguration provider order. FixLog final config at startup.
ASP.NET Core Requests Hang Under Load
CPU low, threads exhausted. WhyBlocking calls inside async pipeline. Fix await SomeAsyncMethod();
Middleware Order Breaks Security
Auth enabled, still vulnerable. WhyMiddleware pipeline order matters. Fix Authentication must come before authorization.
ASP.NET Core Memory Grows Forever
No leaks detected. WhySingleton services holding scoped dependencies. Fix Avoid injecting scoped services into singletons.
Configuration Values Change Between Environments
Works locally, breaks in prod. Why it happensConfiguration providers load order. FixLog final configuration on startup.
ASP.NET Core Requests Hang Randomly
CPU low, threads exhausted. Why it happensBlocking calls inside async pipeline. FixRemove .Result and .Wait().
.NET Core — IHttpContextAccessor Is Not Free
It adds overhead per request. Tip Avoid in hot paths.
.NET Core — Thread Pool Starvation Looks Like CPU Idle
CPU low, requests slow. Cause Blocking async code. Fix Eliminate .Wait() / .Result.
.NET Core — UseHttpsRedirection Breaks Proxies
Behind reverse proxies, HTTPS may loop. ✅ Fix Use forwarded headers middleware.
.NET Core — AddSingleton + State = Data Corruption
Singletons live forever. ❌ Risk Cross-request data leakage. ✅ Rule Never store request-specific state in singletons.
.NET Core — ProblemDetails Improves API Debugging
Standardized error responses save hours. ✅ Benefit Consistent client handling Better logging
.NET Core — Middleware Exceptions Bypass Filters
Exceptions thrown in middleware skip MVC filters. ✅ Fix Handle critical errors inside middleware itself.
Background Tasks the Right Way
The Problem: You are firing off Task.Run() in a controller and hoping it finishes, but the server kills it. The Fix: Implement BackgroundService. It’s the reliable, built-in way to run long-running processes. public class Worker : BackgroundService { protected override async Task ExecuteAsync(CancellationToken stoppingToken) { while (!stoppingToken.IsCancellationRequested) { // Your logic here await Task.Delay(1000, stoppingToken); […]
Hot Reload Configuration with IOptionsSnapshot
The Problem: You changed a value in appsettings.json, but the app keeps using the old value until you restart the server. The Fix: Inject IOptionsSnapshot<T> instead of IOptions<T>. It reads the config file every time the request is made. public class MyService { private readonly MySettings _settings; // Updates immediately when json changes! public MyService(IOptionsSnapshot<MySettings> […]